North Korea’s army said it will take the “substantial military step” of completely cutting off its territory from South Korea on Wednesday, after months of fortifying its heavily armed border.

To cope with 'confrontational hysteria' by U.S. and South Korean forces, North Korea said it will block its border with South Korea permanently and will cut off railways and roads to the country.

North Korea's military said Wednesday that it is completely sealing off its border with South Korea, cutting rail and road connections and building additional defensive fortifications, state-run media reported.